JPS646780Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] This invention relates to the presser foot mechanism of sewing machines, and in particular,
The periphery of the seam forming shape of the cloth is held between the upper surface of the lower plate of the presser foot and the lower surface of the presser foot, and the lower plate of the presser foot and the presser foot are moved in the X-Y direction in conjunction with the sewing machine, The present invention relates to a fabric presser mechanism in a sewing machine that has a stitch shape having a needle drop portion that coincides with the starting edge of the stitch at least after starting to form the stitch on the fabric, for example, sewing around a label onto the fabric.

[Conventional technology]

As this type of presser mechanism, a presser foot as shown in FIG. 5, for example, has been proposed. In this presser mechanism, a bearing part 2 is provided on a presser plate 1 having an outer circumferential shape that presses the inside of the seam forming part of a label L, and a crank 3 is provided between the bearing part 2 and a presser support part (not shown). It is something that Then, press the inside of the seam forming part of the label L with the presser plate 1, and at the beginning of sewing, set the crank 3 at the position indicated by the solid line, form a seam from the sewing start point A in the direction of the arrow, and, for example, stitch the seam up to point B. When the sewing machine is formed, the crank 3 is rotated by a rotation mechanism (not shown) by 180 degrees as shown by the chain double-dashed line to proceed with the sewing further, and when the sewing machine reaches the sewing start point A, the sewing machine is stopped and the rotation mechanism The configuration was such that the crank 3 was returned to the position indicated by the solid line.

[Problem that the invention attempts to solve]

However, in this type of presser mechanism,
The cost of the presser foot is extremely high because an interlocking mechanism such as gears and a rotation mechanism are required to rotate the crank 3 between the solid line and the two-dot chain line. There were flaws.

[Means to solve the problem]

This invention eliminates the above-mentioned drawbacks by forming a needle drop hole along the seam shape and multiple grooves crossing it on the presser foot lower plate, and supporting an auxiliary spring with a free end on the presser foot. The purpose is to exclude.

〔Example〕

This invention will be explained below with reference to the drawings.

Reference numeral 10 designates a presser foot lower plate, which has a needle drop hole 11 along the outer periphery of the seam forming portion and four grooves 12 formed across the needle drop hole 11 in the center thereof.

Reference numeral 13 denotes a presser foot, the base of which is supported by a vertically movable member (not shown), and has a needle drop hole 14 that is the same as the needle hole 11 of the presser foot lower plate 10 and four through holes 1.
5 and four screw holes 16 are formed.

Reference numeral 17 denotes a linear auxiliary spring of about 0.5 mm, and in FIG. Each is fixed to the presser foot 13 with screws 20.

In addition, these presser foot lower plates 10 are attached to the presser foot 13.
These needle holes 1 are linked to the sewing machine mechanism.
It is fed in the X-Y direction so that a seam is formed along the inside of 1 and 14.

Next, the effect will be explained.

When the presser foot 13 is raised, the auxiliary spring 17 also rises, and at that position, the presser foot lower plate 10
After placing the cloth and the label to be sewn on the upper surface of the presser foot 13, the presser foot 13 is lowered.

As a result, the cloth is held between the upper surface of the presser foot lower plate 10 and the lower surface of the presser foot 13, and the upper surface of the label is pressed by the auxiliary spring 17.

From this state, the sewing machine is driven, and the presser foot lower plate 10 and presser foot 13 are moved in the X-Y direction so that a stitch is formed along the inside of the needle drop hole 14. At this time, the label tries to rise as the needle rises, but it does not rise because it is held down by the auxiliary spring 17, and the auxiliary spring 17 is sewn into the seam.

When the periphery of the label is sewn and the sewing is finished and the presser foot 13 is raised, the fabric and label are raised together with the rise of the auxiliary spring, and from that position the fabric is pulled in the direction of the free end 18 of the auxiliary spring 17. The auxiliary spring 17 comes out of the seam and the cloth can be taken out.

[Effect of idea]

As described above, this invention provides the needle drop hole 11 and the groove 12 in the presser foot lower plate 10, and also provides the presser foot
By providing an auxiliary spring 17 with a free end at 3, it is possible to sew at the beginning and end of sewing around the label without providing a conventional crank mechanism or rotation mechanism for rotating it. Since it is possible to form a closed-shaped seam in which the stitches intersect with each other, the structure of the presser mechanism is extremely simple, and the cost of the presser mechanism is reduced.

[Brief explanation of drawings]

Figure 1 is a plan view, Figure 2 is a sectional view taken along line AA in Figure 1, Figure 3 is a sectional view taken along line BB in Figure 1, Figure 4 is an exploded perspective view, and Figure 5 is a conventional cloth. It is a top view which shows a presser mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A presser foot lower plate 10 having a needle drop hole 11 along the periphery of the seam shape and a plurality of grooves 12 formed across the needle hole and outward from the needle hole, and which is freely movable up and down. At the same time, the presser foot 13 has a needle hole 14 that is the same as the needle hole in the lower plate of the presser foot. A fabric presser mechanism for a sewing machine, comprising: an auxiliary spring 17 that presses down a suture piece by being immersed in the auxiliary spring 17;